Introduction to Data Warehouse: Transcript does not match video

Issue in ./help/exporting/data-warehouse/introduction-to-data-warehouse.md: the transcript is for a different video than the one on the page. Where the transcript begins with "Hey everybody, this is Doug," the video begins with "Hello. I'm Marijka Engel."

Open ./help/exporting/data-warehouse/introduction-to-data-warehouse.md and compare its transcript with the video linked on the page. Verify that the transcript corresponds to the displayed video, including its opening, and consider the issue complete when the two match.

Written by the indexing model from the issue text.